from __future__ import annotations

from dataclasses import dataclass
from typing import List


@dataclass
class MainlineStrong:
    """主线强势优质股模型信号占位实现。"""

    def pick(self, candidates: List[str]) -> List[str]:
        return candidates


@dataclass
class MorningGap:
    """早盘巨量高开股模型信号占位实现。"""

    def pick(self, candidates: List[str]) -> List[str]:
        return candidates




